## WPF DataTemplate elements are now visible to UIA

### Scope
Edge

### Version Introduced
4.5

### Source Analyzer Status
Available

### Change Description

Previously, <xref:System.Windows.DataTemplate?displayProperty=name> elements
were invisible to UI Automation. Beginning in 4.5, UI Automation will detect
these elements. This is useful in many cases, but can break tests that depend on
UIA trees not containing <xref:System.Windows.DataTemplate?displayProperty=name>
elements.

- [ ] Quirked
- [ ] Build-time break

### Recommended Action

UI Automation tests for this app may need updated to account for the UIA tree now
including previously invisible
<xref:System.Windows.DataTemplate?displayProperty=name> elements. For example,
tests that expect some elements to be next to each other may now need to expect
previously invisible UIA elements in between. Or tests that rely on certain
counts or indexes for UIA elements may need updated with new values.

### Affected APIs
* `M:System.Windows.DataTemplate.#ctor`
* `M:System.Windows.DataTemplate.#ctor(System.Object)`

### Category
Windows Presentation Foundation (WPF)

<!-- breaking change id: 3 -->